package com.itheima.controller;

import com.itheima.pojo.Result;
import com.itheima.pojo.User;
import com.itheima.service.UserService;
import com.itheima.utils.JwtUtil;
import com.itheima.utils.Md5Util;
import com.itheima.utils.ThreadLocalUtil;
import jakarta.validation.constraints.Pattern;
import org.hibernate.validator.constraints.URL;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.data.redis.core.ValueOperations;
import org.springframework.util.StringUtils;
import org.springframework.validation.annotation.Validated;
import org.springframework.web.bind.annotation.*;

import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.TimeUnit;

/**
 * @Description UserController
 * @Author wu
 * @Date 2024-12-10
 */
@RestController
@RequestMapping("/user")
@Validated
public class UserController {
    @Autowired
    private UserService userService;
    @Autowired
    private StringRedisTemplate stringRedisTemplate;

    @PostMapping("/register")
    public Result register(@Pattern(regexp = "^\\S{3,16}$") String username, @Pattern(regexp = "^\\S{5,16}$") String password) {
//        if(username !=null && username.length()>=5 && username.length()<=16 &&
//        password !=null && password.length()>=5 && password.length()<=16) {
            //查询用户是否存在
            User u = userService.findByUserName(username);
            if(u==null){
                //注册
                userService.register(username,password);
                return Result.success();
            }else{
                //占用
                return Result.error("用户名已被占用");
            }
//        }
//        return Result.error("输入的参数不合法");
    }

    @PostMapping("/login")
    public Result<String> login(@Pattern(regexp = "^\\S{3,16}$") String username, @Pattern(regexp = "^\\S{5,16}$") String password){
        //根据用户名查询用户
        User loginUser = userService.findByUserName(username);
        //判断该用户是否存在
        if(loginUser==null){
            return Result.error("用户名不存在");
        }
        //判断密码是否正确
        if(Md5Util.getMD5String(password).equals(loginUser.getPassword())){
            //生成token
            Map<String,Object> claims = new HashMap<>();
            claims.put("id",loginUser.getId());
            claims.put("username",loginUser.getUsername());
            String token = JwtUtil.genToken(claims);

            //把token存储到redis中
            ValueOperations<String, String> ops = stringRedisTemplate.opsForValue();
            ops.set(token,token,1, TimeUnit.HOURS);
            return Result.success(token);
        }
        return Result.error("密码错误");
    }
    @GetMapping("/userInfo")
    public Result<User> userInfo(/*@RequestHeader(name="Authorization") String token*/){
        /*//根据用户名查询用户
        Map<String, Object> map = JwtUtil.parseToken(token);
        String username = (String)map.get("username");*/
        Map<String, Object> map = ThreadLocalUtil.get();
        String username = (String) map.get("username");
        User user = userService.findByUserName(username);
        return Result.success(user);
    }

    @PutMapping("/update")
    public Result update(@RequestBody @Validated User user){     /*@RequestBody把从前端接收的字符串转换成json实体类对象*/
        userService.update(user);
        return Result.success();
    }

    @PatchMapping("/updateAvatar")
    public Result updateAvatar(@RequestParam @URL String avatarUrl){
        userService.updateAvatar(avatarUrl);
        return Result.success();
    }

    @PatchMapping("/updatePwd")
    public Result updatePwd(@RequestBody Map<String,String> params,@RequestHeader("Authorization") String token){
        //校验参数
        String oldPwd = params.get("old_pwd");
        String newPwd = params.get("new_pwd");
        String rePwd = params.get("re_pwd");

        if(!StringUtils.hasLength(oldPwd) || !StringUtils.hasLength(newPwd) || !StringUtils.hasLength(rePwd)){
            return Result.error("缺少必要的参数");
        }
        //原密码是否正确
        //调用userService根据用户名拿到原密码，再和old_pwd比对
        Map<String,Object> map = ThreadLocalUtil.get();
        String username = (String) map.get("username");
        User loginUser = userService.findByUserName(username);
        if(!loginUser.getPassword().equals(Md5Util.getMD5String(oldPwd))){
            return Result.error("原密码不正确");
        }
        //newPwd和rePwd是否一样
        if(!rePwd.equals(newPwd)){
            return Result.error("两次填写的密码不一样");
        }
        //调用service完成密码更新
        userService.updatePwd(newPwd);
        //删除redis中对应的token
        ValueOperations<String, String> ops = stringRedisTemplate.opsForValue();
        ops.getOperations().delete(token);
        return Result.success();

    }

}
